# CVE-2026-52852: Traccar: Uncontrolled Infinite Loop DoS via Group Parent Cycle

> An authenticated user can cause a denial of service by creating cyclic group hierarchies that trigger infinite loops during report generation.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Sep 2026
- **Updated:** 21 Sep 2026
- **Also known as:** GHSA-6qh3-234v-r254

## What is CVE-2026-52852?

CVE-2026-52852 is a medium-severity denial of service vulnerability in traccar, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Traccar is an open source GPS tracking system. Prior to 6.14.0, an authenticated user with permission to manage groups and request reports can create a cyclic group-parent hierarchy and request a trips or stops report for a device in that hierarchy. org.traccar.api.resource.GroupResource permits the parent cycle, while org.traccar.helper.model.AttributeUtil.lookup follows group parents without cycle detection, a visited set, or a depth limit. The storage-backed lookup reached through TripsConfig. and ReportUtils.slowTripsAndStops never terminates, pins a Jetty worker at high CPU after the client disconnects, and can exhaust the web/API worker pool when requests are repeated. The position-ingestion cache-backed path is not part of the confirmed affected scope. This issue is fixed in 6.14.0.

Weakness: CWE-674 (Uncontrolled Recursion)

## Which versions are affected by CVE-2026-52852?


## How do I fix CVE-2026-52852?

No fix has been published for CVE-2026-52852 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-52852 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52852 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-52852 and fix it if it is affected.

What it is: CVE-2026-52852 is a medium-severity denial of service vulnerability in traccar, published on 17 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52852 exists.

Affected product: traccar. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-52852/ (Markdown: https://insights.sbomify.com/CVE-2026-52852/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-52852
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-52852
- OSV: https://osv.dev/vulnerability/CVE-2026-52852

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-52852/
Summaries are generated and may contain mistakes; the official description above is the record.